1

All data sheets are subject to change without notice

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12-Bit A/D Converter

7672

©2002 Maxwell Technologies

All rights reserved.

08.09.02 Rev 13

• 12-bit high speed A/D converter

tion

• Total dose hardness:

- > 100 krad (Si), depending upon space mission

• Excellent Single Event Effect

- SEU

2

- SEU

2

/Device

• Package:

• Fast conversion times:

- 7672-05: 5 µs

• Low 110 mW typical power consumption

- Corrects all single-bit errors

- Detects all double and some triple-bit errors

• High-speed BiCMOS technology

- Choice of +5V and +10V input ranges

- Operates with +5V and -12V power supplies

- Fast 125 ns bus-access time

digital converter microcircuit features a greater than 100 krad

(Si) total dose tolerance, depending upon space mission. The

7672 uses an accurate high-speed DAC and comparator to

achieve conversion time as low as 5 µs while dissipating only

110 mW of power. The 7672 is designed to be used with an

external reference voltage. This allows the user to choose a

reference whose performance suits the application or to drive

multiple 7672s from a single system reference, since the refer-

ence input is buffered and draws very little current. For digital

signal processing applications where absolute accuracy and

temperature coefficients may be unimportant, a low cost refer-

ence can be used. For optimal precision, a high accuracy ref-

erence where an absolute 12-bit accuracy can be obtained

over a wide temperature range may be used. Analog input

range is pin-selectable for 0 to +5V, 0 to +10V, or ±5V, making

the ADC ideal for data acquisition and analog input/output

cards. A high-speed digital interface (125 ns data access time)

with three state data outputs is compatible with most micro-

processors.

ogy incorporates radiation shielding in the microcircuit pack-

age. It eliminates the need for box shielding while providing

the required radiation shielding for a lifetime in orbit or space

krad (Si) radiation dose tolerance. This product is available

with screening up to Class S.

12-BIT DAC

+

-

+

-

SUCCESSIVE APPROXIMATION

REGISTER

CONTROL

LOGIC

CLOCK

OSCILLATOR

12-BIT LATCH

THREE-STATE

OUTPUT DRIVERS

2

1

24

23

22

21

19

20

18

17

4

11

12

13

16

3

V

REF

AIN1

AIN2

V

DD

V

SS

BUSY

CS

RD

CLK OUT

CLK IN

D0

D3

DGND

D4

D11

AGND

Logic Diagram